.500 



.400 



.300 



Suppressed 



.500 



.400 



.300 



> 



500 



o 

 a> 



o. .400 

 to 



.300 



Intermediate 



,C.L.= 15 



'C.L.= 30 



.500 



400 



.300 



200 



Dominant 



C.L.=50 



C.L.=70 



10 20 30 40 50 60 70 80 90 100 



Distance from apex (feet) 



Figure 1.- -Specific gravity of t±ie outer 20 annual rings as a function of distance from 

 apex of the tree for Abies grandis . Separate curves are drawn for two tjrpical 

 crown lengths in each of four crown classes. Arrows indicate base of live crown. 



